Governing device for fluid-compressors.



G. WAINWRIGHT & F. J. OARNEY. GOVERNING DEVICE FOR FLUID GOMPRESSORS.

APPLIOATION FILED MAY 29, 1912.

1,061,208. Patented May 6, 1913.

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C. WAINWRIGHT & F. J. OARNEY.

GOVERNING DEVICE FOR FLUID GOMPRESSORS.

APPLICATION FILED MAY 29, 1912.

1,061,208. Patented May 6, 1913.

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Vida/"Evans. W /M- A TTORNE 1 CHARLES WAINWRIGHT AND FRED J. CARNEY, 0F ERIE, PENNSYLVANIA.

GOVERNING DEVICE FOR FLUID-COMPRESSORS.

Specification of Letters Patent.

Patented May 6, 1913.

Application filed. May 29, 1912. Serial No. 700,444.

To all whom it may concern Be it known that we, Cnannns MIN- \VRIGII'I. and Fnnn J. Gunner, citizens of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Governing Devices for Fluid-Comprcssors, of which the following is a specification.

The general object of the invention is to adapt a turnable or Corliss intake valve to operate as an unloader for the cylinder of a fluid compressor. And to this end the invention consists in a valve consisting of two parts, each having a series of ports arranged in echelon with respect to the ports of the other part and means arranged to be operated with a predetermined pressure in the receiver of the compressor to effect the moving of one of the valve parts into such position as will place the ports of the said valve part in alinement with the ports of the other valve part.

Other objects will appear and be better understood from that embodiment oi my invention of which the -following is a specification, reference being had to the accompanying drawings forming part hereof, in which it Figure 1 is a detail vertical longitudinal section of the cylinder of a double acting air compressor constructed to cooperate with my improved valve. Fig. 2 is a vertical cross sectional detail of the cylinder shown in Fig. 1 showing the valve partly in section and in elevation and assembled with the cylinder. Fig. 3 is a detail longitudinal section of the inner part of the valve. Fig. t 18 a vertlcal cross sectlon oi: Flg. 3. Fig. 5

is an end elevation of Fig. 3. Fig. ('3 is a view similar to Fig. 3 of the outer part of the valve. Fig. 7 is a vertical cross section of Fig. 6. Fig. 8 is an end elevation of Fig. (3. Fig. 9 is a diagrammatic view of the parts arranged in unloading position and at the beginning of turning movement in the direction of the arrow. Fig. 10 is a view similar to Fig. 9 but showing the position of the parts when approximately one-hall the turn of the valve has been completed.

The cylinder a is constructed with the usual bore b'tor the piston, (not shown), the chamber 0 which communicates with the source of supply through an opening (Z, the outlet ports e e which communicate with the chamber f and a port 9 which establishes communication between the chamber f and a der ot' the single acting type or one having a single intake 71 and a single outlet c.

In a double acting cylinder of the type shown the action of the piston causes practicall y a continuous suction through the opening (Z and an alternate suction through the ports /r-lz. The air drawn through the ports /l.-]l' passes into the valve chambers r -Z which also form part of the intake of the compressor, and thence into the cl1amhers firb also forming part of the intake and linally into the cylinder (4 where it is compressed and discharged through the outlets c,

The pas'ages through the chambers are controlled by the valves, one of which is shown assembled in Fig. 2 and indicated generally by Z. The outer partof cage of each alve as shown in Fig. (3 and indicated by 5, is a hollow cylindrical structure of such size as to nicely fit in the chamber 71. The inner part of each valve as shown in l ig. 3 and indicated by (S is a hollow cylindrical structure oil such size as to nicely fit within the cage The valve is retained in the chamber by caps or bonnets 7 and 8 which are suitably fastened to the cylinder so as to term closures for the ends of the chamber vi and are formed with bosses 9-9 to hear on the opposite ends of the valve but not snlliciently tight to prevent the turning thereof. The cap or bonnet 8 is formed with a bearing 10 for the stem or shaft 11 which has at its inner end a rib 12 arranged in a slot 13 at one end of the cage 5. The outer end of the stem 11 connects with a crank 1; which is rocked by a suitable connection in the form of a rod (not shown) carried by the eccentric or other suitable part of the pump mechanism of the comprc sor. The bonnet 7 is formed with a hearing 14 for a stem 15 carried by the members (3, and a cap 1.6 connected to the outer end of the bearing 14 is adapted for receiving a rod 17 connected at one end with the stem and having its outer end surrounded by a spring 17 which is adjusted by a nut 18. A pin 19 carried by one of the parts of the valve such as the part 6, fits into a groove 20 in the other part of the valve and thereby prevents the independent turning of the said parts but admits of sliding or longitudinal movement of the inner part 6.

The outer end of the part 6 is held by the spring 17 in contact with the bonnet or cap 7 and when so positioned the stem 15 is spaced from the cap 16'and the intervening space forming a chamber 21 which has a port 22 into which is directed a pipe 23 connected with the controller (not shown) which controller is also connected to any suitable point in the receiver of the com pressor.

The cage 5 has oppositely disposed elongated ports 24--24 which correspond to similarly disposed ports 2525 in the memher 6, these ports are always in alinement, being so held'through the interlocking effect afforded by the groove 20 and pin 19. The portions 26-26 and 2727 of the walls of the parts 5 and 6 between the openings 2424 and 2525 are of such widths as to blank the port it and chamber is when the openings 24 and 25 are turned out of alinement with such port and chamber. Adja cent to diagonally opposite sides of the openings 24:24:, there are formed a double se ries of ports 2828 and similarly disposed with respect to the openings 2525 in the part 6 are a double series of ports 2929. The ports 29 are so disposed with respect to the ports 28 of the part 5 that when the part 6 is held by the spring in the position shown in Fig. 2, the said ports 29 will be arranged in echelon with respect to the ports 28 so that passage for the fluid through the parts of the valve cannot be had through these ports. WVhen, however, a sufiicient pressure is attained in the receiver of the compressor to overcome the resistance offered by the controller (not shown) the compressed fluid enters the pipe 23 and passes into the chamber 21 where, by pressing on the stem 15, it e'ifects the longitudinal movement of the part 6 against the action of the spring 17. Now as the part 6 moves longitudinally, the ports 29 thereof are brought into alinement with the ports 28 as shown in Figs. 9 and 10, and since the arc of turning movement of the valve Z is equal or approximately so to the angular distance between remote sides as indicated by 31-31 of either of the openings 25 and either series of ports 29 and further since the blank portions 32 -32 and 33-33 between the openings and ports of the parts 5 and 6 respectively are less in width than the intake and the chamber it will be manifest'that when the ports are in alinement as shown valve will be turned so as to cut off commuj nication with the chamber 0 so that when the piston returns, the entrapped air will be compressed and forced through one of the valves into the chamber f. But when the receiver pressure has operated the valve parts so as to place the ports of one part in alinement with those of the other then instead of the valve cutting off communication with the chamber 0 at the end of the suction stroke of the piston the several seq;

ries of ports will be so arranged as to es tablish communication between the interior of the cylinder and the chamber 0 throughout the compression stroke of the piston so that the air drawn into the cylinder on the,

suction stroke will now be forced outwardly and against no other resistance than that offered by the atmosphere which for present purposes may be taken as nothing. This of course will have the effect of completely unloading the cylinderor in other words, relieving the piston of doing further work until such time as the container pressure is reduced to a point Where the controller (not shown) may effect the cutting ofi" of the fluid supply to the chamber 21 whereupon the parts of the valve will be restored to their normal positions by the spring 17 and the valve permitted to operate again as the ordinary intake valve.

What is claimed as new is:

1. In a governing device for fluid compressors the combination with the pump mechanism; of mechanically operated means arranged to operate intermittently on thev intake of the compressor and means arranged to be operated wlth a predetermlned pressure 1n the receiver of the compressor to co-act with the first mentioned means for the purpose set forth.

2. In a governing device for fluid compressors the combination with the pump mechanism; of mechanically operated turnable means arranged to operate intermittent-1y on the intake of the pump mechanism and means arranged to be operated with a predetermined pressure 1n the receiver of the compressor and to co-act with the first mentioned means for the purpose set forth.

3. In a governing device for fluid com- :3

pressors, the combination with, the pump mechanism; of a mechanically turn-able hol- 10w cylindrical intake Valve including a slidable ported element arranged to be operated with a predetermined pressure in the receiver of the compressor for the purpose set forth.

4. A combined intake valve and controlling device for fluid compressors comprising, inter-fitting mechanically operated turnable members each of which has ports normally out of alinement with the ports of the other member one of said members being arranged to be moved with a predetermined pressure in the receiver of the compressor to effect the alining of its ports with those 15 of the other member for the purpose set forth.

In testimony whereof we have ailixed our signatures in presence of two witnesses.

CHARLES \VAINWRIGHT. FRED J. CARNEY. Witnesses EnwlN L. RoAon, CARLTON F. PLA'rz.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

